What is the Ticketed Event at MK JUly 9, 10PM-1AM?

[Mamiamjo]

i just saw that on our MK day in July there is now a ticked event scheduled 10-1.
Does anyone know what this is and how much busier it will make the park during regular hours?

 

[GADisneyDad14]

i just saw that on our MK day in July there is now a ticked event scheduled 10-1.
Does anyone know what this is and how much busier it will make the park during regular hours?

It’s Disney After Hours. More info in this thread:

"Official" 2018 Disney After Hours (DAH) Thread - NEWS: 11 Summer/Early Fall Dates Added